SUMMARY
Trying to open file dialog (upload) freezes Firefox. Trying to open file dialog (Open file) freezes LibreOffice. KdeInit5 seg fault is reported under Chromium in open file dialog.

STEPS TO REPRODUCE
1. try to open new file in LibreOffice or any other app using open/select file dialog.
2. 
3. 

OBSERVED RESULT
Apps freeze and need to be killed. No file dialog shown.

EXPECTED RESULT
File dialog works.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: KDE Neon
(available in About System)
KDE Plasma Version:  5.21.4
KDE Frameworks Version: 5.81.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
Application: kdeinit5 (kdeinit5), signal: Segmentation fault

[New LWP 1620964]
[New LWP 1620970]
[New LWP 1620972]
[New LWP 1620973]
[New LWP 1620974]
[New LWP 1620975]
[New LWP 1620976]
[New LWP 1620977]
[New LWP 1620978]
[New LWP 1620979]
[New LWP 1620980]
[New LWP 1620981]
[New LWP 1620982]
[New LWP 1620983]
[New LWP 1620984]
[New LWP 1620985]
[New LWP 1620986]
[New LWP 1620987]
[New LWP 1620988]
[New LWP 1620989]
[New LWP 1620990]
[New LWP 1620991]
[New LWP 1620992]
[New LWP 1620994]
[New LWP 1620995]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f31b6d3aaff in __GI___poll (fds=0x7ffe6018f5e8, nfds=1, timeout=1000) at ../sysdeps/unix/sysv/linux/poll.c:29
[Current thread is 1 (Thread 0x7f31b382bcc0 (LWP 1620963))]

Thread 26 (Thread 0x7f31437fe700 (LWP 1620995)):
#0  0x00007ffe601e2aad in  ()
#1  0x00007f31b6d05235 in __GI___clock_gettime (clock_id=1, tp=0x7f31437fdaa0) at ../sysdeps/unix/sysv/linux/clock_gettime.c:38
#2  0x00007f31b71248c5 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f31b712315d in QTimerInfoList::updateCurrentTime() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f31b7123739 in QTimerInfoList::timerWait(timespec&) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f31b7124d56 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f31b574b8ef in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f31b574c29b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f31b574c4a3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f31b7124ffb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f31b70c91eb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f31b6ee3a52 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f31b2a59f4b in  () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#13 0x00007f31b6ee4bec in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#15 0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7f3143fff700 (LWP 1620994)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b859860) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b859810, cond=0x558f5b859838) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b859838, mutex=0x558f5b859810) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7f3164ff9700 (LWP 1620992)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b786340) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b7862f0, cond=0x558f5b786318) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b786318, mutex=0x558f5b7862f0) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f31657fa700 (LWP 1620991)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b786340) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b7862f0, cond=0x558f5b786318) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b786318, mutex=0x558f5b7862f0) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f3165ffb700 (LWP 1620990)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b786340) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b7862f0, cond=0x558f5b786318) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b786318, mutex=0x558f5b7862f0) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f31667fc700 (LWP 1620989)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b786340) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b7862f0, cond=0x558f5b786318) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b786318, mutex=0x558f5b7862f0) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f3166ffd700 (LWP 1620988)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b786340) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b7862f0, cond=0x558f5b786318) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b786318, mutex=0x558f5b7862f0) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f31677fe700 (LWP 1620987)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b785c38) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b785be8, cond=0x558f5b785c10) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b785c10, mutex=0x558f5b785be8) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f3167fff700 (LWP 1620986)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b785c38) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b785be8, cond=0x558f5b785c10) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b785c10, mutex=0x558f5b785be8) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f3194ff9700 (LWP 1620985)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b785c38) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b785be8, cond=0x558f5b785c10) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b785c10, mutex=0x558f5b785be8) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f31957fa700 (LWP 1620984)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b785c38) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b785be8, cond=0x558f5b785c10) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b785c10, mutex=0x558f5b785be8) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f3195ffb700 (LWP 1620983)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b785c38) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b785be8, cond=0x558f5b785c10) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b785c10, mutex=0x558f5b785be8) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f31967fc700 (LWP 1620982)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b785c38) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b785be8, cond=0x558f5b785c10) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b785c10, mutex=0x558f5b785be8) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f3196ffd700 (LWP 1620981)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b785c38) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b785be8, cond=0x558f5b785c10) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b785c10, mutex=0x558f5b785be8) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f3197fff700 (LWP 1620980)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b785c38) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b785be8, cond=0x558f5b785c10) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b785c10, mutex=0x558f5b785be8) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f319cff9700 (LWP 1620979)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b785c38) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b785be8, cond=0x558f5b785c10) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b785c10, mutex=0x558f5b785be8) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f319d7fa700 (LWP 1620978)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b785c38) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b785be8, cond=0x558f5b785c10) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b785c10, mutex=0x558f5b785be8) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f319dffb700 (LWP 1620977)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b785c38) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b785be8, cond=0x558f5b785c10) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b785c10, mutex=0x558f5b785be8) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f319e7fc700 (LWP 1620976)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b785c3c) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b785be8, cond=0x558f5b785c10) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b785c10, mutex=0x558f5b785be8) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f319effd700 (LWP 1620975)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b786888) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b786838, cond=0x558f5b786860) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b786860, mutex=0x558f5b786838) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f319f7fe700 (LWP 1620974)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b786888) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b786838, cond=0x558f5b786860) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b786860, mutex=0x558f5b786838) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f31977fe700 (LWP 1620973)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b786888) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b786838, cond=0x558f5b786860) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b786860, mutex=0x558f5b786838) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f319ffff700 (LWP 1620972)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b786888) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b786838, cond=0x558f5b786860) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b786860, mutex=0x558f5b786838) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f31a4e50700 (LWP 1620970)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x558f5b7844fc) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x558f5b7844a8, cond=0x558f5b7844d0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x558f5b7844d0, mutex=0x558f5b7844a8) at pthread_cond_wait.c:638
#3  0x00007f31aa3c7b5b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f31aa3c775b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f31b095d700 (LWP 1620964)):
#0  0x00007f31b6d3aaff in __GI___poll (fds=0x7f31b095cc68, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f31b7a97c1a in  () at /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f31b7a9990a in xcb_wait_for_event () at /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f31b0de3d58 in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f31b6ee4bec in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f31b62a3609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f31b6d47293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f31b382bcc0 (LWP 1620963)):
[KCrash Handler]
#4  __memmove_avx_unaligned_erms () at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:468
#5  0x00007f31b7c74061 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/thumbnail.so
#6  0x00007f31b2f12ab6 in KIO::SlaveBase::dispatch(int, QByteArray const&) (this=0x7ffe60190030, command=67, data=...) at ./src/core/slavebase.cpp:1215
#7  0x00007f31b2f13156 in KIO::SlaveBase::dispatchLoop() (this=0x7ffe60190030) at ./src/core/slavebase.cpp:336
#8  0x00007f31b7c70c42 in kdemain () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/thumbnail.so
#9  0x0000558f5b318076 in  ()
#10 0x0000558f5b3194da in  ()
#11 0x0000558f5b319eca in  ()
#12 0x0000558f5b3150ff in  ()
#13 0x00007f31b6c4c0b3 in __libc_start_main (main=0x558f5b314750, argc=3, argv=0x7ffe60190828, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe60190818) at ../csu/libc-start.c:308
#14 0x0000558f5b315cce in  ()
[Inferior 1 (process 1620963) detached]